First slot launches patch but not game

When I launch a DDO team from ISBoxer, I get the game login screen after the patch screen, but once I login and select server the first slot never launches the game. Also none of the other slots launch the patcher. Some months ago I noticed my 4+ man teams would not launch the fourth or later slots, although I could play fine with the partial team that launched. In both cases new parties that I created in ISBoxer to check if the old parties were bugged had the same problems as the old parties. Is this just me, or is there a known issue with DDO like this?
Since people have been sharing their setups, my best team is 6 wizards. Their skeletons and other summons will target and attack independently, and you can make buttons to find closest target on mouse click down and cast a spell on mouse click up. So while your summons are in front you can fire 6x lightning bolt, 6x fireball, etc. per click. It lets you get the full effect out of 6 characters at once if you're able to plan the fights appropriately. Once you get Death Aura and Negative Energy Burst you can heal yourselves a bit too. I beat a reaper 1 difficulty low level quest this way. It was worth all the setup.
Since people have been sharing their setups, my best team is 6 wizards. Their skeletons and other summons will target and attack independently, and you can make buttons to find closest target on mouse click down and cast a spell on mouse click up. So while your summons are in front you can fire 6x lightning bolt, 6x fireball, etc. per click. It lets you get the full effect out of 6 characters at once if you're able to plan the fights appropriately. Once you get Death Aura and Negative Energy Burst you can heal yourselves a bit too. I beat a reaper 1 difficulty low level quest this way. It was worth all the setup.